// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "cc/layers/heads_up_display_layer.h"

#include <algorithm>

#include "base/trace_event/trace_event.h"
#include "cc/layers/heads_up_display_layer_impl.h"
#include "cc/trees/layer_tree_host.h"
#include "cc/trees/layer_tree_settings.h"

namespace cc {

scoped_refptr<HeadsUpDisplayLayer> HeadsUpDisplayLayer::Create()
{
    return make_scoped_refptr(new HeadsUpDisplayLayer());
}

HeadsUpDisplayLayer::HeadsUpDisplayLayer()
    : typeface_(SkTypeface::MakeFromName("times new roman", SkFontStyle()))
{
    if (!typeface_) {
        typeface_ = SkTypeface::MakeFromName(
            "monospace", SkFontStyle::FromOldStyle(SkTypeface::kBold));
    }
    DCHECK(typeface_.get());
    SetIsDrawable(true);
    UpdateDrawsContent(HasDrawableContent());
}

HeadsUpDisplayLayer::~HeadsUpDisplayLayer() { }

void HeadsUpDisplayLayer::PrepareForCalculateDrawProperties(
    const gfx::Size& device_viewport, float device_scale_factor)
{
    gfx::Size device_viewport_in_layout_pixels = gfx::Size(
        device_viewport.width() / device_scale_factor,
        device_viewport.height() / device_scale_factor);

    gfx::Size bounds;
    gfx::Transform matrix;
    matrix.MakeIdentity();

    if (layer_tree_host()->GetDebugState().ShowHudRects()) {
        bounds = device_viewport_in_layout_pixels;
    } else {
        int size = 256;
        bounds.SetSize(size, size);
        matrix.Translate(device_viewport_in_layout_pixels.width() - size, 0.0);
    }

    SetBounds(bounds);
    SetTransform(matrix);
}

bool HeadsUpDisplayLayer::HasDrawableContent() const
{
    return true;
}

std::unique_ptr<LayerImpl> HeadsUpDisplayLayer::CreateLayerImpl(
    LayerTreeImpl* tree_impl)
{
    return HeadsUpDisplayLayerImpl::Create(tree_impl, id());
}

void HeadsUpDisplayLayer::PushPropertiesTo(LayerImpl* layer)
{
    Layer::PushPropertiesTo(layer);
    TRACE_EVENT0("cc", "HeadsUpDisplayLayer::PushPropertiesTo");
    HeadsUpDisplayLayerImpl* layer_impl = static_cast<HeadsUpDisplayLayerImpl*>(layer);

    layer_impl->SetHUDTypeface(typeface_);
}

} // namespace cc
